tonight from people who were never going to find the day when it was time to leave afghanistan. i never thought the american government and the american military would make the mistake of vietnam again. then came 9/11 and america's massive military overreaction, which pretended vietnam never happened. >> we went to afghanistan almost 20 years ago with clear goals, get those who attacked us on september 11th, 2001 and make sure al qaeda could not use afghanistan as a base from which to attack us again. we did that. we severely degraded al qaeda and afghanistan. we never gave up the hunt for osama bin laden and we got him. that was a decade ago. >> there's a pattern here. when the united states leaves a foreign war that it cannot win, it's always going to look messy.